Magnetic biasing and MFM image reconstruction

A novel experimental technique of magnetic biasing for the Magnetic Force Microscopy (MFM) imaging is introduced. This technique enforces linearity of the imaging system and, in this way, it facilitates the interpretation of images of magnetization patterns. The technique of numerical reconstruction of the curl-free vector magnetization from a raw image obtained by the linearized MFM system is presented. An example is given which demonstrates the significant difference between the reconstructed magnetization and the raw image. This stresses the usefulness of magnetic biasing and image reconstruction for MFM image interpretation.